西藏阿伊拉日居山南麓第四纪冰川沉积物及其ESR年龄测定

在西藏札达盆地北缘阿伊拉日居山南北两麓及切割山脉的各沟谷中, 分布着 4 套第四纪冰川与冰水沉积物, 其冰川沉积物的电子自旋共振(ESR)测年结果分别为 1 161~730 ka BP、319~336 kaBP、211 ka BP和105~15 ka BP. 测年结果表明, 在札达盆地北缘阿伊拉日居山南麓所发生的 4 次冰川作用, 其形成时期分别为早更新世晚期、中更新世中晚期、中更新世晚期和末次冰期.

Quaternary Glacial Deposits and Their ESR Dating Results on the South Slopes of the Ayilariju Mountains,Tibet Autonomous Region

There are four sets of Quaternary glacial deposits along the south and north slopes and the valleys of the Ayilariju Mountains in north of Zhada basin, Tibet Autonomous Region. The ESR dating results of them are 1161～730 ka BP, 319～336 ka BP, 211 ka BP and 105～15 ka BP. These results show that the ages of the four sets of glacial deposits along the south slopes of the Ayilariju Mountains should correspond to the late epoch of the early Pleistocene, the middle and late epochs of the middle Pleistocene, the late epoch of the middle Pleistocene and the Last Glaciation in the southern Tibetan Plateau.